I. Improper Blood Collection Procedure
1. Collecting blood before the alcohol has dried: Undried alcohol will dilute the blood, leading to lower results. The correct procedure is to wait 10 seconds after disinfection before collecting blood, and avoid using iodine.
2. Squeezing the finger to collect blood: Forceful squeezing will introduce tissue fluid, diluting the blood glucose. The correct procedure is to rub your hands together or soak them in warm water before collecting blood, allowing the blood to flow out naturally.
3. Unclean blood collection site: Residual sugar on hands (such as from fruit) will interfere with the results. The correct procedure is to wash your hands with soap and water before testing.
II. Incorrect Use and Storage of Test Strips
1. Expired or damp test strips: Use test strips within 3 months of opening, avoiding moisture and high temperatures. The correct procedure is to store them in a sealed container away from light, and check the expiration date regularly.
2. Incompatible test strip and blood glucose meter codes: Check the codes each time you change a box of test strips to ensure they match.
III. Inadequate Instrument Calibration and Maintenance
1. Long-term Lack of Blood Glucose Meter Calibration: It is recommended to calibrate the blood glucose meter every six months, using a simulated blood glucose solution or comparing it with venous blood from a hospital.
2. Improper Storage of the Blood Glucose Meter: Avoid high temperature, humidity, and strong magnetic field environments. When cleaning, use a soft cloth dampened with water; do not use alcohol.
IV. Other Minor Errors
1. Irregular Testing Time: It is recommended to test at fixed times (e.g., fasting, 2 hours after a meal), avoiding random testing.
2. Inappropriate Blood Sampling Site Selection: Prioritize the side of the ring finger, as it has fewer nerves and less pain; avoid the thumb and toes.
3. Insufficient Battery Power: Low battery power will affect the results; replace the battery promptly.
